118 results on '"Barbosa, Pedro"'
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2. Sodium-glucose cotransporter-2 inhibitor (SGLT2i) plus glucagon-like peptide type 1 receptor combination is more effective than SGLT2i plus dipeptidyl peptidase-4 inhibitor combination in treating obese mice metabolic dysfunction-associated steatotic liver disease (MASLD).
- Author
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Reis-Barbosa PH and Mandarim-de-Lacerda CA
- Subjects
- Animals, Male, Mice, Obesity drug therapy, Fatty Liver drug therapy, Drug Therapy, Combination, Mice, Obese, Diet, High-Fat adverse effects, Linagliptin pharmacology, Glucosides pharmacology, Glucosides administration & dosage, Benzhydryl Compounds pharmacology, Sodium-Glucose Transporter 2 Inhibitors pharmacology, Dipeptidyl-Peptidase IV Inhibitors pharmacology, Mice, Inbred C57BL, Glucagon-Like Peptide-1 Receptor agonists
- Abstract
Background: Monotherapy to treat obesity-associated liver insult is limited., Objectives: In diet-induced obese mice showing metabolic dysfunction-associated steatotic liver disease (MASLD), we aimed to compare the combinations of sodium-glucose cotransporter-2 inhibitor (SGLT2i, empagliflozin, E), dipeptidyl peptidase-4 inhibitor (DPP4i, linagliptin, L), and glucagon-like peptide type 1 receptor agonist (GLP1RA, dulaglutide, D)., Methods: Male 3-month-old C57BL/6J mice were fed for 12 weeks in a control (C, n = 10) or high-fat (HF, n = 30) diet. Then, mice were followed for three additional weeks: C, HF, HF E + L, and HF E + D (n = 10/group)., Results: HF versus C showed higher hepatic triacylglycerol (TAG, +82%), steatosis (+850%), glucose intolerance (+71%), insulin (+98%), and insulin resistance (+68%). Compared to the HF group, HF E + L showed lower glucose intolerance (-60%), insulin (-61%), insulin resistance (-46%), TAG (-61%), and steatosis (-58%), and HF E + D showed lower glucose intolerance (-71%), insulin (-58%), insulin resistance (-62%), TAG (-61%), and steatosis (-82%). The principal component analysis (PCA) placed the HF group and the HF E + D group on opposite sides, while the HF E + L group was placed between C and HF E + D., Conclusion: PCA separated the groups considering the metabolism-related genes (glucose and lipid), mitochondrial biogenesis, and steatosis. The two pharmacological combinations showed beneficial effects in treating obesity and MASLD. However, the combination of SGLT2i and GLP1RA showed more potent beneficial effects on MASLD than SGLT2i and DPP4i and, therefore, should be the recommended combination., (© 2024 Société Française de Pharmacologie et de Thérapeutique. Published by John Wiley & Sons Ltd.)
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- 2024
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3. Implementation of a Screening Program for High-Grade Anal Dysplasia in High-Risk Patients in a Tertiary Cancer Center.
- Author
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Araujo ROC, Valadão M, Silva JADDCE, Lintomen L, Garrido MM, Barbosa PLM, Piragibe MMM, Carvalho KM, Jay N, and Leal FE
- Abstract
Introduction: The incidence of anal squamous cell carcinoma (SCC) has been increasing over the last decades. Human papillomavirus (HPV) infection accounts for more than 90% of anal cancers, and HIV co-infection increases the risk of invasive cancer. Men who have sex with men (MSM) with HIV are the highest risk group for developing anal high-grade squamous intraepithelial lesions (aHSILs), which can be found in 45%-50% of these patients and are precursor lesions for invasive cancer. Anal cytology is an effective screening tool, but it lacks sensitivity. High-resolution anoscopy (HRA) is the gold standard procedure for diagnosis and treatment of aHSILs. Recent data suggest that early detection and treatment of aHSILs could prevent the development of invasive cancer in this population., Objective: The objective of the study was to describe the implementation of an office-based screening program for anal cancer prevention in a Comprehensive Cancer Center in Brazil., Methods: Training included participation in the International Anal Neoplasia Society (IANS) HRA course at UCSF Medical Center Mount Zion in San Francisco, CA, USA, by three colorectal cancer surgeons. In-person and hands-on training was provided by a specialist through the AIDS Malignancy Consortium (AMC) of the US NIH. Equipment purchased and provided by the AMC included a colposcope with a digital camera, a hands-free mouse pedal, and a photo documentation imaging software program that allows images to be recorded for documentation and training purposes., Results: The program was implemented in 2022 after a delay of more than two years due to the COVID-19 pandemic. An average of 24 exams are performed monthly. Patients with HIV aged 35 years or older who are undergoing antiretroviral therapy were recruited from the metropolitan area of Rio de Janeiro and referred by primary care providers for screening. Patients diagnosed with aHSILs are scheduled for in-office ablative treatment in the clinic. From March 2022 to June 2024, 324 exams were performed, and aHSIL was found in 38.2% of 220 high-risk patients, including 45 of 129 MSMs (34.9%), 6 of 19 transgender women (31.6%), and 33 of 72 women living with HIV (45.8%). A total of 69 treatments for aHSIL were performed in 62 patients. Patients are followed on a regular basis and long-term results are awaited, including the effectiveness of local therapy for aHSIL., Conclusions: The screening and treatment program was successfully implemented in a tertiary comprehensive Cancer Center. Team training and external proctorship were decisive for the achievement of benchmark standards. The program aims to permanently provide screening for the prevention of anal cancer through the detection and treatment of aHSIL within the National Cancer Institute of Brazil for populations considered at-risk for anal cancer., (© 2024 Wiley Periodicals LLC.)
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- 2024
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4. Trp53 Deletion Promotes Exacerbated Colitis, Facilitates Lgr5+ Cancer Stem Cell Expansion, and Fuels Tumorigenesis in AOM/DSS-Induced Colorectal Cancer.
- Author
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Cunha AF, Delou JM, Barbosa PS, Conceição JSM, Souza KCS, Chagas V, Soletti RC, de Souza HSP, and Borges HL
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- Animals, Mice, Mice, Inbred C57BL, Disease Models, Animal, Gene Deletion, Tumor Suppressor Protein p53 metabolism, Tumor Suppressor Protein p53 genetics, Receptors, G-Protein-Coupled metabolism, Receptors, G-Protein-Coupled genetics, Dextran Sulfate, Neoplastic Stem Cells metabolism, Neoplastic Stem Cells pathology, Azoxymethane toxicity, Colitis chemically induced, Colitis genetics, Colitis pathology, Colitis metabolism, Colorectal Neoplasms pathology, Colorectal Neoplasms genetics, Colorectal Neoplasms metabolism, Colorectal Neoplasms chemically induced, Colorectal Neoplasms etiology, Carcinogenesis genetics, Carcinogenesis pathology, Carcinogenesis metabolism, Mice, Knockout
- Abstract
Colorectal cancer CRC remains one of the leading causes of cancer-related deaths worldwide, with chronic intestinal inflammation identified as a major risk factor. Notably, the tumor suppressor TP53 undergoes mutation at higher rates and earlier stages during human inflammation-driven colon tumorigenesis than in sporadic cases. We investigated whether deleting Trp53 affects inflammation-induced tumor growth and the expression of Lgr5+ cancer stem cells in mice. We examined azoxymethane (AOM)/dextran sodium sulfate (DSS)-induced colon tumorigenesis in wild-type Trp53 (+/+) , heterozygous (+/-) , and knockout (-/-) mice. Trp53-/- mice showed increased sensitivity to DSS colitis and earlier accelerated tumorigenesis with 100% incidence. All groups could develop invasive tumors, but knockouts displayed the most aggressive features. Unlike wild-type CRC, knockouts selectively showed increased populations of Lgr5+ colon cancer stem-like cells. Trp53 loss also boosted laminin, possibly facilitating the disruption of the tumor border. This study highlights how Trp53 deletion promotes the perfect storm of inflammation and stemness, driving colon cancer progression. Trp53 deletion dramatically shortened AOM/DSS latency and improved tumor induction efficiency, offering an excellent inflammation-driven CRC model.
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- 2024
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5. Persistent Activation of the P2X7 Receptor Underlies Chronic Inflammation and Carcinogenic Changes in the Intestine.
- Author
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Santana PT, de Lima IS, Silva E Souza KCD, Barbosa PHS, and de Souza HSP
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- Humans, Animals, Inflammation metabolism, Inflammation pathology, Inflammatory Bowel Diseases metabolism, Inflammatory Bowel Diseases pathology, Adenosine Triphosphate metabolism, Gastrointestinal Microbiome, Signal Transduction, Intestinal Mucosa metabolism, Intestinal Mucosa pathology, Colorectal Neoplasms metabolism, Colorectal Neoplasms pathology, Colorectal Neoplasms etiology, Intestines pathology, Intestines microbiology, Receptors, Purinergic P2X7 metabolism, Receptors, Purinergic P2X7 genetics
- Abstract
Aberrant signaling through damage-associated molecular patterns (DAMPs) has been linked to several health disorders, attracting considerable research interest over the last decade. Adenosine triphosphate (ATP), a key extracellular DAMP, activates the purinergic receptor P2X7, which acts as a danger sensor in immune cells and is implicated in distinct biological functions, including cell death, production of pro-inflammatory cytokines, and defense against microorganisms. In addition to driving inflammation mediated by immune and non-immune cells, the persistent release of endogenous DAMPs, including ATP, has been shown to result in epigenetic modifications. In intestinal diseases such as inflammatory bowel disease (IBD) and colorectal cancer (CRC), consequent amplification of the inflammatory response and the resulting epigenetic reprogramming may impact the development of pathological changes associated with specific disease phenotypes. P2X7 is overexpressed in the gut mucosa of patients with IBD, whereas the P2X7 blockade prevents the development of chemically induced experimental colitis. Recent data suggest a role for P2X7 in determining gut microbiota composition. Regulatory mechanisms downstream of the P2X7 receptor, combined with signals from dysbiotic microbiota, trigger intracellular signaling pathways and inflammasomes, intensify inflammation, and foster colitis-associated CRC development. Preliminary studies targeting the ATP-P2X7 pathway have shown favorable therapeutic effects in human IBD and experimental colitis.
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- 2024
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6. The dual glucose-dependent insulinotropic polypeptide/glucagon-like peptide-1 receptor agonist tirzepatide effects on body weight evolution, adiponectin, insulin and leptin levels in the combination of obesity, type 2 diabetes and menopause in mice.
- Author
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Reis-Barbosa PH, Marcondes-de-Castro I, Marinho TS, Aguila MB, and Mandarim-de-Lacerda CA
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- Animals, Female, Mice, Body Weight drug effects, Diet, High-Fat adverse effects, Gastric Inhibitory Polypeptide therapeutic use, Glucagon-Like Peptide-2 Receptor, Mice, Inbred C57BL, Ovariectomy, Adiponectin blood, Diabetes Mellitus, Type 2 drug therapy, Glucagon-Like Peptide-1 Receptor agonists, Glucagon-Like Peptide-1 Receptor metabolism, Insulin blood, Leptin blood, Menopause drug effects, Obesity drug therapy
- Abstract
Aim: Tirzepatide (Tzp), a novel dual agonist glucose-dependent insulinotropic polypeptide/glucagon-like peptide-1, is approved for treating insulin resistance and obesity, and menopausal women consuming a high-calorie diet are a target to study the Tzp effect. Therefore, we aimed to allometrically scale body weight (BW) in Tzp-treated obese diabetic menopausal mice., Materials and Methods: Three-month-old C57BL/6 female mice had bilateral ovariectomy (Ovx) or a sham procedure and for 12 weeks were fed a control diet or a high-fat and high sucrose diet (n = 120/each group [control (C), obese diabetic (Od), Ovx (O), sham (S), Tzp (T)]). Tzp was subcutaneously administered (10 nmol/kg) or vehicle once a day for an additional 4 weeks. The analysis considered log-transformed data and the allometric equation log y = log a + b log x., Results: Od and OdO showed more upward slopes than C and CO. In C, BW was non-allometric by T administration. Od and OdO showed slightly positive slopes (more prominent in OdO than Od). OdT and OdOT showed negative slopes, significant intercepts, and more robust Pearson coefficients than untreated ones. A potent drug effect was seen with BW allometric decline. Interactions between diet versus Ovx and diet versus Tzp affected weight gain. Diet versus Ovx versus Tzp affected food intake., Conclusions: A model was developed to show three usual factors observed in mature women. Notably, Tzp improved the metabolism and weight loss of OdO mice. Tzp-treated mice showed negative allometric BW across treatment time, which is a quantitative assessment that allows better comparison between results., (© 2024 John Wiley & Sons Ltd.)
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- 2024
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7. Identification and characterization of circulating and adipose tissue infiltrated CD20 + T cells from subjects with obesity that undergo bariatric surgery.
- Author
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Pinho ACO, Barbosa P, Lazaro A, Tralhão JG, Pereira MJ, Paiva A, Laranjeira P, and Carvalho E
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- Humans, Male, Female, Middle Aged, Adult, Diabetes Mellitus, Type 2 immunology, Diabetes Mellitus, Type 2 metabolism, Insulin Resistance immunology, T-Lymphocyte Subsets immunology, T-Lymphocyte Subsets metabolism, Immunophenotyping, T-Lymphocytes immunology, T-Lymphocytes metabolism, Biomarkers, Bariatric Surgery, Obesity immunology, Obesity metabolism, Obesity surgery, Antigens, CD20 metabolism, Adipose Tissue metabolism
- Abstract
T cells play critical roles in adipose tissue (AT) inflammation. The role of CD20
+ T cell in AT dysfunction and their contributing to insulin resistance (IR) and type 2 diabetes progression, is not known. The aim was to characterize CD20+ T cells in omental (OAT), subcutaneous (SAT) and peripheral blood (PB) from subjects with obesity (OB, n = 42), by flow cytometry. Eight subjects were evaluated before (T1) and 12 months post (T2) bariatric/metabolic surgery (BMS). PB from subjects without obesity (nOB, n = 12) was also collected. Higher percentage of CD20+ T cells was observed in OAT, compared to PB or SAT, in OB-T1. CD20 expression by PB CD4+ T cells was inversely correlated with adiposity markers, while follicular-like CD20+ T cells were positively correlated with impaired glucose tolerance (increased HbA1c). Notably, among OB-T1, IR establishment was marked by a lower percentage and absolute number of PB CD20+ T cells, compared nOB. Obesity was associated with higher percentage of activated CD20+ T cells; however, OAT-infiltrated CD20+ T cells from OB-T1 with diabetes displayed the lowest activation. CD20+ T cells infiltrating OAT from OB-T1 displayed a phenotype towards IFN-γ-producing Th1 and Tc1 cells. After BMS, the percentage of PB CD4+ CD20+ T cells increased, with reduced Th1 and increased Th17 phenotype. Whereas in OAT the percentage of CD20+ T cells with Th1/17 and Tc1/17 phenotypes increased. Interestingly, OAT from OB pre/post BMS maintained higher frequency of effector memory CD20+ T cells. In conclusion, CD20+ T cells may play a prominent role in obesity-related AT inflammation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)- Published
- 2024
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8. Unveiling the antifungal mechanisms of CTP, a new copper(II)-theophylline/1,10-phenanthroline complex, on drug-resistant non-albicans Candida species.
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Frota HF, Barbosa PF, Lorentino CMA, Affonso LRF, Ramos LS, Oliveira SSC, Souza LOP, Abosede OO, Ogunlaja AS, Branquinha MH, and Santos ALS
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- Reactive Oxygen Species metabolism, Humans, Antifungal Agents pharmacology, Antifungal Agents chemistry, Antifungal Agents chemical synthesis, Phenanthrolines pharmacology, Phenanthrolines chemistry, Candida drug effects, Copper chemistry, Copper pharmacology, Microbial Sensitivity Tests, Drug Resistance, Fungal drug effects, Coordination Complexes pharmacology, Coordination Complexes chemistry, Coordination Complexes chemical synthesis, Theophylline pharmacology, Theophylline chemistry
- Abstract
Candida species undeniably rank as the most prevalent opportunistic human fungal pathogens worldwide, with Candida albicans as the predominant representative. However, the emergence of non-albicans Candida species (NACs) has marked a significant shift, accompanied by rising incidence rates and concerning trends of antifungal resistance. The search for new strategies to combat antifungal-resistant Candida strains is of paramount importance. Recently, our research group reported the anti-Candida activity of a coordination compound containing copper(II) complexed with theophylline (theo) and 1,10-phenanthroline (phen), known as "CTP" - Cu(theo)
2 phen(H2 O).5H2 O. In the present work, we investigated the mechanisms of action of CTP against six medically relevant, antifungal-resistant NACs, including C. auris, C. glabrata, C. haemulonii, C. krusei, C. parapsilosis and C. tropicalis. CTP demonstrated significant efficacy in inhibiting mitochondrial dehydrogenases, leading to heightened intracellular reactive oxygen species production. CTP treatment resulted in substantial damage to the plasma membrane, as evidenced by the passive incorporation of propidium iodide, and induced DNA fragmentation as revealed by the TUNEL assay. Scanning electron microscopy images of post-CTP treatment NACs further illustrated profound alterations in the fungal surface morphology, including invaginations, cavitations and lysis. These surface modifications significantly impacted the ability of Candida cells to adhere to a polystyrene surface and to form robust biofilm structures. Moreover, CTP was effective in disassembling mature biofilms formed by these NACs. In conclusion, CTP represents a promising avenue for the development of novel antifungals with innovative mechanisms of action against clinically relevant NACs that are resistant to antifungals commonly used in clinical settings., (© 2024. The Author(s), under exclusive licence to Springer Nature B.V.)- Published
- 2024
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9. Cymbopogon citratus Allelochemical Volatiles as Potential Biopesticides against the Pinewood Nematode.
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Faria JMS and Barbosa P
- Abstract
Traditional pesticides are based on toxic compounds that can reduce biodiversity, degrade the environment, and contribute to less healthy living. Plant allelochemicals can provide more environmentally friendly and sustainable alternatives. Essential oils (EOs) are complex mixtures of plant secondary metabolites that show strong biological activities. In the present study, the EOs of Cymbopogon citratus were screened for activity against the pinewood nematode (PWN), the causal agent of pine wilt disease. To understand their nematicidal properties, EOs were fractioned into hydrocarbon molecules and oxygen-containing compounds, and their main compounds were acquired and tested separately against the PWN. The EO oxygen-containing molecules fraction was highly active against the PWN (EC
50 = 0.279 µL/mL), with citral and geraniol showing higher activities (EC50 = 0.266 and 0.341 µL/mL, respectively) than emamectin benzoate (EC50 = 0.364 µL/mL), a traditional nematicide used against the PWN. These compounds were additionally reported to be less toxic to non-target organisms (fish, invertebrates, and algae) and safer to human health (with higher reported toxicity thresholds) and predicted to exert fewer environmental impacts than traditional nematicides. Resorting to approved natural compounds can quickly leverage the development of sustainable alternatives to traditional nematicides.- Published
- 2024
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10. Lean MASLD: are overweight or obese people with MASLD 'protected' from CVD mortality?
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Lima LCV, Amaral MJM, Barbosa GF, Barbosa P, and Souza M
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- Humans, Body Mass Index, Risk Factors, Obesity complications, Cardiovascular Diseases mortality, Overweight complications
- Abstract
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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- 2024
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11. Saps1-3 Antigens in Candida albicans : Differential Modulation Following Exposure to Soluble Proteins, Mammalian Cells, and Infection in Mice.
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Barbosa PF, Gonçalves DS, Ramos LS, Mello TP, Braga-Silva LA, Pinto MR, Taborda CP, Branquinha MH, and Santos ALS
- Abstract
The secreted aspartic peptidases (Saps) of Candida albicans play crucial roles in various steps of fungal-host interactions. Using a flow cytometry approach, this study investigated the expression of Saps1-3 antigens after (i) incubation with soluble proteins, (ii) interaction with mammalian cells, and (iii) infection in immunosuppressed BALB/c mice. Supplementation strategies involving increasing concentrations of bovine serum albumin (BSA) added to yeast carbon base (YCB) medium as the sole nitrogenous source revealed a positive and significant correlation between BSA concentration and both the growth rate and the percentage of fluorescent cells (%FC) labeled with anti-Saps1-3 antibodies. Supplementing the YCB medium with various soluble proteins significantly modulated the expression of Saps1-3 antigens in C. albicans . Specifically, immunoglobulin G, gelatin, and total bovine/human sera significantly reduced the %FC, while laminin, human serum albumin, fibrinogen, hemoglobin, and mucin considerably increased the %FC compared to BSA. Furthermore, co-cultivating C. albicans yeasts with either live epithelial or macrophage cells induced the expression of Saps1-3 antigens in 78% (mean fluorescence intensity [MFI] = 152.1) and 82.7% (MFI = 178.2) of the yeast cells, respectively, compared to BSA, which resulted in 29.3% fluorescent cells (MFI = 50.9). Lastly, the yeasts recovered from the kidneys of infected immunosuppressed mice demonstrated a 4.8-fold increase in the production of Saps1-3 antigens (MFI = 246.6) compared to BSA, with 95.5% of yeasts labeled with anti-Saps1-3 antibodies. Altogether, these results demonstrated the positive modulation of Saps' expression in C. albicans by various key host proteinaceous components, as well as by in vitro and in vivo host challenges.
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- 2024
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12. Update on the transdifferentiation of pancreatic cells into functional beta cells for treating diabetes.
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Spezani R, Reis-Barbosa PH, and Mandarim-de-Lacerda CA
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- Humans, Animals, Transcription Factors metabolism, Transcription Factors genetics, Cell Differentiation, Pancreas metabolism, Pancreas pathology, Cell Transdifferentiation, Insulin-Secreting Cells metabolism, Insulin-Secreting Cells cytology, Diabetes Mellitus, Type 2 therapy, Diabetes Mellitus, Type 2 metabolism
- Abstract
The increasing global prevalence and associated comorbidities need innovative approaches for type 2 diabetes mellitus (T2DM) prevention and treatment. Genetics contributes significantly to T2DM susceptibility, and genetic counseling is significant in detecting and informing people about the diabetic risk. T2DM is also intricately linked to overnutrition and obesity, and nutritional advising is beneficial to mitigate diabetic evolution. However, manipulating pancreatic cell plasticity and transdifferentiation could help beta cell regeneration and glucose homeostasis, effectively contributing to the antidiabetic fight. Targeted modulation of transcription factors is highlighted for their roles in various aspects of pancreatic cell differentiation and function, inducing non-beta cells' conversion into functional beta cells (responsive to glucose). In addition, pharmacological interventions targeting specific receptors and pathways might facilitate cell transdifferentiation aiming to maintain or increase beta cell mass and function. However, the mechanisms underlying cellular reprogramming are not yet well understood. The present review highlights the primary transcriptional factors in the endocrine pancreas, focusing on transdifferentiation as a primary mechanism. Therefore, islet cell reprogramming, converting one cell type to another and transforming non-beta cells into insulin-producing cells, depends, among others, on transcription factors. It is a promising fact that new transcription factors are discovered every day, and their actions on pancreatic islet cells are revealed. Exploring these pathways associated with pancreatic development and islet endocrine cell differentiation could unravel the molecular intricacies underlying transdifferentiation processes, exploring novel therapeutic strategies to treat diabetes. The medical use of this biotechnology is expected to be achievable within a short time., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)
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- 2024
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13. Hypersexuality in neurological disorders: A systematic review.
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Tayim N, Barbosa P, and Panicker J
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- Humans, Sexual Dysfunctions, Psychological psychology, Sexual Dysfunctions, Psychological therapy, Male, Female, Parkinson Disease psychology, Parkinson Disease therapy, Parkinson Disease physiopathology, Parkinson Disease complications, Sexual Behavior psychology, Nervous System Diseases psychology, Nervous System Diseases therapy
- Abstract
Background: Hypersexuality (HS) accompanying neurological conditions remains poorly characterized despite profound psychosocial impacts. Objective We aimed to systematically review the literature on HS in patients with neurological disorders. Study selection and analysis We conducted a systematic review to identify studies that reported HS in neurological disorders. HS was defined as a condition characterized by excessive and persistent preoccupation with sexual thoughts, urges, and behaviors that cause significant distress or impairment in personal, social, or occupational functioning. Data on demographics, assessment techniques, associated elements, phenotypic manifestations, and management strategies were also extracted. Findings The final analysis included 79 studies on HS, encompassing 32 662 patients across 81 cohorts with neurological disorders. Parkinson's disease was the most frequently studied condition (55.6%), followed by various types of dementia (12.7%). Questionnaires were the most common assessment approach for evaluating HS, although the techniques varied substantially. Alterations in the dopaminergic pathways have emerged as contributing mechanisms based on the effects of medication cessation. However, standardized treatment protocols still need to be improved, with significant heterogeneity in documented approaches. Critical deficiencies include risks of selection bias in participant sampling, uncontrolled residual confounding factors, and lack of blinded evaluations of reported outcomes. Conclusions and clinical implications Despite growth in the last decade, research on HS remains limited across neurological conditions, with lingering quality and methodological standardization deficits. Key priorities include advancing assessment tools, elucidating the underlying neurobiology, and formulating management guidelines., Prospero Registration Number: CRD42017036478., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. Published by BMJ.)
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- 2024
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14. Stroke rehabilitation pathways during the first year: A cost-effectiveness analysis from a cohort of 460 individuals.
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Barbosa PM, Szrek H, Ferreira LN, Cruz VT, and Firmino-Machado J
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- Humans, Female, Male, Aged, Middle Aged, Aged, 80 and over, Decision Trees, Cohort Studies, Critical Pathways economics, Stroke economics, Cost-Effectiveness Analysis, Stroke Rehabilitation economics, Stroke Rehabilitation methods, Stroke Rehabilitation statistics & numerical data, Cost-Benefit Analysis, Quality-Adjusted Life Years
- Abstract
Background: Stroke burden challenges global health, and social and economic policies. Although stroke recovery encompasses a wide range of care, including in-hospital, outpatient, and community-based rehabilitation, there are no published cost-effectiveness studies of integrated post-stroke pathways., Objective: To determine the most cost-effective rehabilitation pathway during the first 12 months after a first-ever stroke., Methods: A cohort of people in the acute phase of a first stroke was followed after hospital discharge; 51 % women, mean (SD) age 74.4 (12.9) years, mean National Institute of Health Stroke Scale score 11.7 (8.5) points, and mode modified Rankin Scale score 3 points. We developed a decision tree model of 9 sequences of rehabilitation care organised in 3 stages (3, 6 and 12 months) through a combination of public, semi-public and private entities, considering both the individual and healthcare service perspectives. Health outcomes were expressed as quality-adjusted life years (QALY) over a 1-year time horizon. Costs included healthcare, social care, and productivity losses. Sensitivity analyses were conducted on model input values., Results: From the individual perspective, pathway 3 (Short-term Inpatient Unit » Community Clinic) was the most cost-effective, followed by pathway 1 (Rehabilitation Centre » Community Clinic). From the healthcare service perspective, pathway 3 was the most cost-effective followed by pathway 7 (Outpatient Hospital » Private Clinic). All other pathways were considered strongly dominated and excluded from the analysis. The total 1-year mean cost ranged between €12104 and €23024 from the individual's perspective and between €10992 and €31319 from the healthcare service perspective., Conclusion: Assuming a willingness-to-pay threshold of one times the national gross domestic product (€20633/QALY), pathway 3 (Short-term Inpatient Unit » Community Clinic) was the most cost-effective strategy from both the individual and healthcare service perspectives. Rehabilitation pathway data contribute to the development of a future integrated care system adapted to different stroke profiles., Competing Interests: Declaration of competing interest None., (Copyright © 2024 The Author(s). Published by Elsevier Masson SAS.. All rights reserved.)
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- 2024
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15. The role of CD20 + T cells: Insights in human peripheral blood.
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Pinho ACO, Barbosa P, Pereira MJ, Paiva A, Carvalho E, and Laranjeira P
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- Adult, Female, Humans, Male, Middle Aged, CD4-Positive T-Lymphocytes immunology, CD4-Positive T-Lymphocytes metabolism, Cytokines metabolism, Immunologic Memory immunology, Interferon-gamma, Interleukin-17 blood, Interleukin-2 Receptor alpha Subunit immunology, Lymphocyte Activation immunology, Memory T Cells immunology, Programmed Cell Death 1 Receptor metabolism, Programmed Cell Death 1 Receptor immunology, Tumor Necrosis Factor-alpha, Antigens, CD20 immunology, Flow Cytometry, T-Lymphocyte Subsets immunology, T-Lymphocyte Subsets metabolism
- Abstract
CD20
+ T cells constitute a small subset of T cells. These are found among CD4+ , CD8+ , CD4+ CD8+ , CD4- CD8- T, and TCRγδ+ T cells, and have been poorly characterized. The aim of this study was to characterize peripheral blood (PB) CD20+ T cells and compare them to their PB CD20- T cell counterparts. PB from 17 healthy individuals was collected. The distribution of CD20+ T cells among maturation-associated T cells compartments (naïve, central memory, transitional memory, effector memory, and effector T cells), their polarization, activation status, and expression of immune-regulatory proteins were evaluated by flow cytometry. Their function was also assessed, by measuring IFN-γ, TNF-α, and IL-17 production. Compared with CD20- T cells, CD20+ T cells represent a higher proportion of transitional memory cells. Furthermore, CD20+ T cells display a proinflammatory phenotype, characterized by the expansion of Th1, Th1/17, and Tc1 cell subsets , associated to a high expression of activation (CD25) and exhaustion (PD-1) markers. In addition, the simultaneous production of the proinflammatory cytokines IFN-γ, TNF-α, and IL-17 was also detected in CD4+ CD20+ T cells. Our results show that CD20+ T cells are phenotypically and functionally different from CD20- T cells, suggesting that these cells are a distinct subset of T cells., (© 2024 The Authors. Cytometry Part B: Clinical Cytometry published by Wiley Periodicals LLC on behalf of International Clinical Cytometry Society.)- Published
- 2024
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16. Antifungal potential of the new copper(II)-theophylline/1,10-phenanthroline complex against drug-resistant Candida species.
- Author
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Frota HF, Lorentino CMA, Barbosa PF, Ramos LS, Barcellos IC, Giovanini L, Souza LOP, Oliveira SSC, Abosede OO, Ogunlaja AS, Pereira MM, Branquinha MH, and Santos ALS
- Subjects
- Copper pharmacology, Theophylline pharmacology, Candida albicans, Drug Resistance, Fungal, Microbial Sensitivity Tests, Antifungal Agents pharmacology, Antifungal Agents chemistry, Candida, Phenanthrolines
- Abstract
Candida spp. are the commonest fungal pathogens worldwide. Antifungal resistance is a problem that has prompted the discovery of novel anti-Candida drugs. Herein, 25 compounds, some of them containing copper(II), cobalt(II) and manganese(II) ions, were initially evaluated for inhibiting the growth of reference strains of Candida albicans and Candida tropicalis. Eight (32%) of the compounds inhibited the proliferation of these yeasts, displaying minimum inhibitory concentrations (MICs) ranging from 31.25 to 250 μg/mL and minimum fungicidal concentration (MFCs) from 62.5 to 250 μg/mL. Drug-likeness/pharmacokinetic calculated by SwissADME indicated that the 8 selected compounds were suitable for use as topical drugs. The complex CTP, Cu(theo)
2 phen(H2 O).5H2 O (theo = theophylline; phen = 1,10-phenanthroline), was chosen for further testing against 10 medically relevant Candida species that were resistant to fluconazole/amphotericin B. CTP demonstrated a broad spectrum of action, inhibiting the growth of all 20 clinical fungal isolates, with MICs from 7.81 to 62.5 μg/mL and MFCs from 15.62 to 62.5 μg/mL. Conversely, CTP did not cause lysis in erythrocytes. The toxicity of CTP was evaluated in vivo using Galleria mellonella and Tenebrio molitor. CTP had no or low levels of toxicity at doses ranging from 31.25 to 250 μg/mL for 5 days. After 24 h of treatment, G. mellonella larvae exhibited high survival rates even when exposed to high doses of CTP (600 μg/mL), with the 50% cytotoxic concentration calculated as 776.2 μg/mL, generating selectivity indexes varying from 12.4 to 99.4 depending on each Candida species. These findings suggest that CTP could serve as a potential drug to treat infections caused by Candida species resistant to clinically available antifungals., (© 2023. The Author(s), under exclusive licence to Springer Nature B.V.)- Published
- 2024
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17. Nematicidal Activity of Phytochemicals against the Root-Lesion Nematode Pratylenchus penetrans .
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Barbosa P, Faria JMS, Cavaco T, Figueiredo AC, Mota M, and Vicente CSL
- Abstract
Plant-parasitic nematodes (PPNs) are highly damaging pests responsible for heavy losses in worldwide productivity in a significant number of important plant crops. Common pest management strategies rely on the use of synthetic chemical nematicides, which have led to serious concerns regarding their impacts on human health and the environment. Plant natural products, or phytochemicals, can provide a good source of agents for sustainable control of PPNs, due to their intrinsic characteristics such as higher biodegradability, generally low toxicity for mammals, and lower bioaccumulation in the environment. In this work, the nematicidal activity of 39 phytochemicals was determined against the root-lesion nematode (RLN) Pratylenchus penetrans using standard direct and indirect contact methodologies. Overall, the RLN was tolerant to the tested phytochemicals at the highest concentration, 2 mg/mL, seldom reaching full mortality. However, high activities were obtained for benzaldehyde, carvacrol, 3-octanol, and thymol, in comparison to other phytochemicals or the synthetic nematicide oxamyl. These phytochemicals were seen to damage nematode internal tissues but not its cuticle shape. Also, the environmental and (eco)toxicological parameters reported for these compounds suggest lower toxicity and higher safety of use than oxamyl. These compounds appear to be good candidates for the development of biopesticides for a more sustainable pest management strategy.
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- 2024
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18. Tuberculosis screening in the European migrant population: a scoping review of current practices.
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Braga S, Vieira M, Barbosa P, Ramos JP, and Duarte R
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Responding to a surge in new tuberculosis (TB) cases among migrants from high-incidence countries, low-incidence European nations have heeded World Health Organization recommendations by implementing TB screening in this population. This review aims to synthesise evidence on current screening strategies for active TB and latent tuberculosis infection (LTBI) in European high-income countries, and their main barriers and interventions. PubMed, Web of Science and Scopus were searched from March to April 2023, including articles in English, published in the last decade, pertaining to screening strategies for active TB or LTBI in Europe focused on migrants, excluding those exclusively composed of refugees, asylum seekers or other migrant populations. 32 studies fit the criteria. Screening in migrants varies between countries regarding timing, population, screening location and diagnosis. Furthermore, some barriers prevent migrants from benefiting from screening, namely physical, cultural and professional barriers. Additional research is needed to determine the patterns through which regular migrants adhere to current screening strategies in European countries., Competing Interests: Conflict of interest: S. Braga has nothing to disclose. M. Vieira reports grants or contracts from the Institute of Public Health of the University of Porto, and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, all outside the submitted work. P. Barbosa reports grants or contracts from the Institute of Public Health of the University of Porto (ISPUP), and the School of Medicine and Biomedical Sciences (ICBAS), and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova de Gaia e Espinho, all outside the submitted work. J.P. Ramos reports grants or contacts from the Institute of Public Health of the University of Porto, Institute of Biomedical Sciences Abel Salazar, University of Porto Faculty of Psychology and Education Sciences, and University of Porto Camara Municipal do Porto, and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, all outside the submitted work. R. Duarte reports grants or contracts from School of Medicine and Biomedical Sciences (ICBAS), and Centro Hospitalar de Vila Nova de Gaia e Espinho, outside the submitted work., (Copyright ©ERS 2024.)
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- 2024
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19. People first: a participatory community approach on patient-reported outcomes in tuberculosis.
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Martín D, Barbosa P, Ramos JP, Vieira M, and Duarte R
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Patient-reported outcomes (PROs) play a crucial role in understanding the impact of tuberculosis (TB) on both individuals and communities. Despite advances in TB treatment, conventional outcome definitions often overlook essential components of people with TB's experiences, leading to disparities in treatment understanding. The incorporation of PROs in TB scientific research can help bridge the gap between the health system and people's needs and expectations. PROs can offer valuable insights into non-observable constructs like health literacy, self-efficacy and overall wellbeing, contributing to the comprehensive assessment of diagnosis, treatment and research end-points. Participatory community approaches, such as Community-Based Participatory, emphasise the engagement and involvement of relevant stakeholders in designing interventions tailored to their needs. Key stakeholders, including healthcare professionals, researchers, clinical trial investigators, public health officials, and community health workers, TB survivors and people with TB, can play a vital role in promoting patient-centred care and engaging directly with the TB-affected community. An increased and cross-collaborative effort for the inclusion of PROs in TB research can entail their potential role in developing effective treatment regimens and promoting adherence, while maximising community engagement and improving outcomes for those affected by TB., Competing Interests: Conflict of interest: The authors have no conflicts of interest to declare. All co-authors have seen and agree with the manuscript's contents and there is no financial interest to report., (Copyright ©ERS 2024.)
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- 2024
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20. Probable 4-Repeat Tauopathy Criteria Predict Brain Amyloid Negativity, Distinct Clinical Features, and FDG-PET/MRI Neurodegeneneration Patterns in Corticobasal Syndrome.
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Parmera JB, de Godoi Carneiro C, de Almeida IJ, de Oliveira MCB, Barbosa PM, Studart-Neto A, Ono CR, Nitrini R, Buchpiguel CA, Barbosa ER, Brucki SMD, and Coutinho AM
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- Humans, Fluorodeoxyglucose F18 metabolism, Brain diagnostic imaging, Magnetic Resonance Imaging, Atrophy metabolism, Corticobasal Degeneration, Tauopathies metabolism
- Abstract
Background: Corticobasal syndrome (CBS) is associated with diverse underlying pathologies, including the four-repeat (4R)-tauopathies. The Movement Disorders Society (MDS) criteria for progressive supranuclear palsy (PSP) proposed the novel category "probable 4R-tauopathy" to address the phenotypic overlap between PSP and corticobasal degeneration (CBD)., Objectives: To investigate the clinical ability of the MDS-PSP criteria for probable 4R-tauopathy in predicting a negative amyloid-PET in CBS. Additionally, this study aims to explore CBS patients classified as 4R-tauopathy concerning their clinical features and neuroimaging degeneration patterns., Methods: Thirty-two patients with probable CBS were prospectively evaluated and split into those who fulfilled or did not fulfill the 4R-tauopathy criteria (CBS-4RT+ vs. CBS-4RT-). All patients underwent positron emission tomographies (PET) with [
18 F]fluorodeoxyglucose and [11 C]Pittsburgh Compound-B (PIB) on a hybrid PET-MRI scanner to perform multimodal quantitative comparisons with a control group., Results: Eleven patients were clinically classified as CBS-4RT+, and only one had a positive PIB-PET. The CBS-4RT+ classification had 92% specificity, 52% sensitivity, and 69% accuracy in predicting a negative PIB-PET. The CBS-4RT+ group presented with dysarthria and perseveration more often than the CBS-4RT- group. Moreover, the CBS-4RT+ group showed a prominent frontal hypometabolism extending to the supplementary motor area and striatum, and brain atrophy at the anterior cingulate and bilateral striata., Conclusions: The 4R-tauopathy criteria were highly specific in predicting a negative amyloid-PET in CBS. Patients classified as 4R-tauopathy presented distinct clinical aspects, as well as brain metabolism and atrophy patterns previously associated with tauopathies., (© 2023 International Parkinson and Movement Disorder Society.)- Published
- 2024
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21. Bariatric Surgery Induces Alterations in the Immune Profile of Peripheral Blood T Cells.
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Barbosa P, Pinho A, Lázaro A, Paula D, Tralhão JG, Paiva A, Pereira MJ, Carvalho E, and Laranjeira P
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- Humans, T-Lymphocytes, Regulatory, T-Lymphocyte Subsets, Obesity surgery, Obesity metabolism, Th1 Cells, Bariatric Surgery
- Abstract
Low-grade inflammation is closely linked to obesity and obesity-related comorbidities; therefore, immune cells have become an important topic in obesity research. Here, we performed a deep phenotypic characterization of circulating T cells in people with obesity, using flow cytometry. Forty-one individuals with obesity (OB) and clinical criteria for bariatric surgery were enrolled in this study. We identified and quantified 44 different circulating T cell subsets and assessed their activation status and the expression of immune-checkpoint molecules, immediately before (T1) and 7-18 months after (T2) the bariatric surgery. Twelve age- and sex-matched healthy individuals (nOB) were also recruited. The OB participants showed higher leukocyte counts and a higher percentage of neutrophils. The percentage of circulating Th1 cells were negatively correlated to HbA1c and insulin levels. OB Th1 cells displayed a higher activation status and lower PD-1 expression. The percentage of Th17 and Th1/17 cells were increased in OB, whereas the CD4
+ Tregs' percentage was decreased. Interestingly, a higher proportion of OB CD4+ Tregs were polarized toward Th1- and Th1/17-like cells and expressed higher levels of CCR5. Bariatric surgery induced the recovery of CD4+ Treg cell levels and the expansion and activation of Tfh and B cells. Our results show alterations in the distribution and phenotype of circulating T cells from OB people, including activation markers and immune-checkpoint proteins, demonstrating that different metabolic profiles are associated to distinct immune profiles, and both are modulated by bariatric surgery.- Published
- 2024
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22. Neurological gait assessment.
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Mermelstein S, Barbosa P, and Kaski D
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- Humans, Gait, Ataxia complications, Parkinson Disease diagnosis, Parkinsonian Disorders complications, Cerebellar Ataxia complications, Gait Disorders, Neurologic diagnosis, Gait Disorders, Neurologic etiology
- Abstract
Gait disorders are a common feature of neurological disease. The gait examination is an essential part of the neurological clinical assessment, providing valuable clues to a myriad of causes. Understanding how to examine gait is not only essential for neurological diagnosis but also for treatment and prognosis. Here, we review aspects of the clinical history and examination of neurological gait to help guide gait disorder assessment. We focus particularly on how to differentiate between common gait abnormalities and highlight the characteristic features of the more prevalent neurological gait patterns such as ataxia, waddling, steppage, spastic gait, Parkinson's disease and functional gait disorders. We also offer diagnostic clues for some unusual gait presentations, such as dystonic, stiff-person and choreiform gait, along with red flags that help differentiate atypical parkinsonism from Parkinson's disease., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2024
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23. CD8 + Treg cells play a role in the obesity-associated insulin resistance.
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Barbosa P, Pinho A, Lázaro A, Rosendo-Silva D, Paula D, Campos J, Tralhão JG, Pereira MJ, Paiva A, Laranjeira P, and Carvalho E
- Subjects
- Humans, T-Lymphocytes, Regulatory, Programmed Cell Death 1 Receptor metabolism, Obesity metabolism, CD8-Positive T-Lymphocytes metabolism, Diabetes Mellitus, Type 2 metabolism, Insulin Resistance genetics
- Abstract
Obesity-related chronic low-grade inflammation may trigger insulin resistance and type 2 diabetes (T2D) development. Cells with regulatory phenotype have been shown to be reduced during obesity, especially CD4
+ Treg cells. However, little is known about the CD8+ Treg cells. Therefore, we aim to characterize the CD8+ Treg cells in human peripheral blood and adipose tissue, specifically, to address the effect of obesity and insulin resistance in this regulatory immune cell population. A group of 42 participants with obesity (OB group) were recruited. Fourteen of them were evaluated pre- and post-bariatric surgery. A group of age- and sex-matched healthy volunteers (n = 12) was also recruited (nOB group). CD8+ Treg cell quantification and phenotype were evaluated by flow cytometry, in peripheral blood (PB), subcutaneous (SAT), and visceral adipose tissues (VAT). The OB group displayed a higher percentage of CD8+ Treg cells in PB, compared to the nOB. In addition, they were preferentially polarized into Tc1- and Tc1/17-like CD8+ Treg cells, compared to nOB. Moreover, SAT displayed the highest content of CD8+ Tregs infiltrated, compared to PB or VAT, while CD8+ Tregs infiltrating VAT displayed a higher percentage of cells with Tc1-like phenotype. Participants with pre-diabetes displayed a reduced percentage of TIM-3+ CD8+ Tregs in circulation, and PD-1+ CD8+ Tregs infiltrated in the VAT. An increase in the percentage of circulating Tc1-like CD8+ Treg cells expressing PD-1 was observed post-surgery. In conclusion, obesity induces significant alterations in CD8+ Treg cells, affecting their percentage and phenotype, as well as the expression of important immune regulatory molecules., Competing Interests: Declaration of competing interest The authors declare that there are no conflicts of interest., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)- Published
- 2024
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24. Unveiling the power of neutral and inclusive language in tuberculosis prevention and care.
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Barbosa P, Vieira M, Ramos JP, and Duarte R
- Abstract
Language plays a crucial role in shaping discourses and responses related to disease, particularly tuberculosis (TB). Stigmatising language and attitudes surrounding TB can lead to discrimination and marginalisation of affected individuals, creating barriers to seeking proper diagnosis and treatment. The terminology used to describe TB-affected individuals can be disempowering and criminalising, reinforcing an "othering" of those affected. To combat this, engaging with TB-affected communities is essential to co-construct a neutral and inclusive vocabulary that respects the dignity of individuals and fosters empathy and support. Thus, an inclusive language approach empowers affected individuals as active participants in their health management, encouraging open communication and the development of support networks. By adopting a neutral and inclusive language system, healthcare providers and communities can work together to remove unnoticed hurdles and align with the World Health Organization's TB care and prevention goals., Competing Interests: Conflict of interest: P. Barbosa and M. Vieira report grants from the Institute of Public Health of the University of Porto and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, outside the submitted work. J.P. Ramos reports grants from the Institute of Public Health of the University of Porto, Camara Municipal do Porto, Institute of Biomedical Sciences Abel Salazar, University of Porto, and Faculty of Psychology and Education Sciences of the University of Porto, and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, outside the submitted work. R. Duarte reports the following grants: 2021 (current) – NTMENACE: Nontuberculous mycobacteria from drinking water: beyond the lung disease epidemic (PTDC/BIA-MIC/0122/2021) (Team Member); 2021 (current) - UNITE4TB: Academia and Industry innovation and treatment for Tuberculosis (H2020 - UNIT4TB - 101007873) (WP Lead on communication), outside the submitted work., (Copyright ©ERS 2024.)
- Published
- 2023
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25. Cotadutide improves brown adipose tissue thermogenesis in obese mice.
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Spezani R, Marcondes-de-Castro IA, Marinho TS, Reis-Barbosa PH, Cardoso LEM, Aguila MB, and Mandarim-de-Lacerda CA
- Subjects
- Mice, Animals, Male, Mice, Obese, Mice, Inbred C57BL, Obesity drug therapy, Obesity metabolism, Adipocytes, Brown, Diet, High-Fat adverse effects, Thermogenesis, Dynamins metabolism, Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha metabolism, Adipose Tissue, Brown metabolism, Vascular Endothelial Growth Factor A metabolism
- Abstract
We studied the effect of cotadutide, a dual agonist glucagon-like peptide 1 (GLP1)/Glucagon, on interscapular brown adipose tissue (iBAT) remodeling and thermogenesis of obese mice. Twelve-week-old male C57BL/6 mice were fed a control diet (C group, n = 20) or a high-fat diet (HF group, n = 20) for ten weeks. Then, animals were redivided, adding cotadutide treatment: C, CC, HF, and HFC for four additional weeks. The multilocular brown adipocyte structure showed fat conversion (whitening), hypertrophy, and structural disarray in the HF group, which was reverted in cotadutide-treated animals. Cotadutide enhances the body temperature, thermogenesis, and sympathetic innervation (peroxisome proliferator-activated receptor-α, β3 adrenergic receptor, interleukin 6, and uncoupled protein 1), reduces pro-inflammatory markers (disintegrin and metallopeptidase domain, morphogenetic protein 8a, and neuregulin 4), and improves angiogenesis (vascular endothelial growth factor A, and perlecan). In addition, cotadutide enhances lipolysis (perilipin and cell death-inducing DNA fragmentation factor α), mitochondrial biogenesis (nuclear respiratory factor 1, transcription factor A mitochondrial, mitochondrial dynamin-like GTPase, and peroxisome proliferator-activated receptor gamma coactivator 1α), and mitochondrial fusion/fission (dynamin-related protein 1, mitochondrial fission protein 1, and parkin RBR E3 ubiquitin protein ligase). Cotadutide reduces endoplasmic reticulum stress (activating transcription factor 4, C/EBP homologous protein, and growth arrest and DNA-damage inducible), and extracellular matrix markers (lysyl oxidase, collagen type I α1, collagen type VI α3, matrix metallopeptidases 2 and 9, and hyaluronan synthases 1 and 2). In conclusion, the experimental evidence is compelling in demonstrating cotadutide's thermogenic effect on obese mice's iBAT, contributing to unraveling its action mechanisms and the possible translational benefits., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Inc. All rights reserved.)
- Published
- 2023
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26. AMPK/mTOR pathway significance in healthy liver and non-alcoholic fatty liver disease and its progression.
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Marcondes-de-Castro IA, Reis-Barbosa PH, Marinho TS, Aguila MB, and Mandarim-de-Lacerda CA
- Subjects
- Humans, AMP-Activated Protein Kinases metabolism, Liver pathology, TOR Serine-Threonine Kinases metabolism, Obesity, Mechanistic Target of Rapamycin Complex 1 metabolism, Non-alcoholic Fatty Liver Disease metabolism
- Abstract
Obesity is related to several organs, but the liver is particularly affected. Adenosine monophosphate-activated protein kinase (AMPK) is a cellular energy sensor and regulator of liver lipid dysfunction and glucose metabolism. The mechanistic target of rapamycin (mTOR) is a protein kinase regulating cell growth, survival, metabolism, and immunity. Together, these pathways are involved in obesity, insulin resistance, non-alcoholic fatty liver disease (NAFLD) and its progression, and autophagy. During energy demand, liver kinase B (LKB) phosphorylation helps activate the AMPK/mTOR pathways. Likewise, the protein forkhead box O family (FOXO) negatively regulates adipogenesis by binding to the promoter sites of peroxisome proliferator-activated receptor-gamma coactivator 1-alpha, initiating adipogenesis. In addition, acetyl-CoA carboxylase, which regulates de novo lipogenesis, is linked to LKB and FOXO in developing NAFLD. The kinase complex, consisting of Unc-51-like autophagy-activating kinase 1 or 2 (ULK1, ULK2) by stimulating autophagy, and eliminating fat droplets in NAFLD, is regulated by mTORC1 and negatively regulated by AMPK that suppresses liver lipogenesis and increases fatty acid oxidation. Also, ULK1 is essential for initiating phagophore formation, establishing macrophagy, and generating autophagosomes. The selective breakdown of lipid droplets through macroautophagy, or macrolipophagy, occurs on a cellular energy level using free fatty acids. In addition, mTORC1 promotes lipogenesis by activating sterol regulatory element-binding protein. Finding new components and novel regulatory modes in signaling is significant for a better understanding of the AMPK/mTOR pathways, potentially facilitating the development of future diagnostic and therapeutic strategies for NAFLD and its progression to non-alcoholic steatohepatitis, cirrhosis, and hepatocellular carcinoma., (© 2023 Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.)
- Published
- 2023
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27. From healthcare system to individuals through stroke rehabilitation pathways.Outcomes, information, and satisfaction along 12 months prospective cohort in Portugal.
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Maciel Barbosa P, Firmino-Machado J, Ferreira LN, Tedim Cruz V, and Szrek H
- Subjects
- Humans, Portugal, Prospective Studies, Quality of Life, Patient Satisfaction, Personal Satisfaction, Stroke Rehabilitation, Stroke therapy, Stroke diagnosis
- Abstract
Background: The nature and quality of stroke survivor rehabilitation varies throughout Europe, including in Portugal, having not been widely monitored or benchmarked., Objectives: This study analyses the stroke care pathway from three perspectives: healthcare system, process, and patient., Methods: The study uses data from a one-year single-center prospective cohort of first stroke patients, assessed at baseline, 3, 6, and 12 months. Care pathways and settings were described in terms of organizational model, funding, patient involvement, frequency and intensity and multidisciplinary team. Patient-level information and satisfaction were evaluated using a 10-point numeric rating scale. Kruskal - Wallis and post-hoc tests were used to compare EQ-5D-3 L, National Institute of Health Stroke Scale (NIHSS), Modified Rankin Scale (mRS), Barthel Index, Mini-Mental State Examination scores between pathways and settings., Results: A total of 391 acute stroke patients, with a mean disability of 3.7 (mRS) and severity of 11.7 (NIHSS) participated. Six pathways and eight settings were described. A lack of compliance between guidelines and care was identified. There were significant differences in the four outcomes between the six pathways (p-values 0.007 to 0.020) suggesting inefficiency and inequalities, with an inadequate level of information and patient satisfaction. After post-hoc analysis, pathways 1 and 2 showed highest outcomes (p-values 0.001 to 0.002). Within settings, short-term units showed high scores, followed by rehabilitation center, outpatient hospital, and community clinic (p-values 0.001 to 0.040)., Conclusion: A multilevel characterization of the post-stroke rehabilitation pathway showed a more complete perspective on stroke management which may contribute to future rehabilitation and stroke policies.
- Published
- 2023
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28. Building bridges: multidisciplinary teams in tuberculosis prevention and care.
- Author
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Ramos JP, Vieira M, Pimentel C, Argel M, Barbosa P, and Duarte R
- Abstract
People with or affected by tuberculosis (TB) experience complex social and cultural constraints that may affect treatment outcomes by impeding access to proper care or by hindering treatment adherence. Low levels of health literacy which leads to inadequate disease information; stigma, discrimination and other forms of prejudice that may result in marginalisation and ostracisation; and socioeconomic vulnerabilities that hamper one's capacity to access essential goods or increase the risk of exposure to the disease are some of the barriers highlighted. These complex hurdles are also disproportionately felt by people with or affected by TB due to gender-related inequalities that need to be properly addressed. Additionally, TB prevention and care should encompass interventions aimed at improving and promoting mental health, given that mental unhealth may further thwart treatment adherence and success. A multifaceted and multidisciplinary approach to TB is required to answer these complex barriers., Competing Interests: Conflict of interest: J.P. Ramos reports grants or contracts from the Institute of Public Health of the University of Porto, Camara Municipal do Porto, Institute of Biomedical Sciences Abel Salazar, University of Porto, and Faculty of Psychology and Education Sciences of the University of Porto, outside the submitted work; and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, outside the submitted work. M. Vieira ports grants or contracts from the Institute of Public Health of the University of Porto, outside the submitted work; and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, outside the submitted work. P. Barbosa reports grants or contracts from the Institute of Public Health of the University of Porto, outside the submitted work; and consulting fees from Núcleo de Investigação em Pneumologia, Centro Hospitalar Vila Nova Gaia/Espinho, outside the submitted work. R. Duarte reports grants or contracts from H2020 - UNIT4TB – 101007873, and H2020 - EUSAT-RCS – 823890, outside the submitted work. The remaining authors have nothing to disclose., (Copyright ©ERS 2023.)
- Published
- 2023
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29. First Report on the Synergistic Interaction between Essential Oils against the Pinewood Nematode Bursaphelenchus xylophilus .
- Author
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Faria JMS, Cavaco T, Gonçalves D, Barbosa P, Teixeira DM, Moiteiro C, and Inácio ML
- Abstract
Control of the pinewood nematode (PWN), the causal agent of pine wilt disease, can be achieved through the trunk injection of nematicides; however, many pesticides have been linked to environmental and human health concerns. Essential oils (EOs) are suitable alternatives due to their biodegradability and low toxicity to mammals. These complex mixtures of plant volatiles often display multiple biological activities and synergistic interactions between their compounds. The present work profiled the toxicity of eight EOs against the PWN in comparison to their 1:1 mixtures, to screen for successful synergistic interactions. Additionally, the main compounds of the most synergistic mixtures were characterized for their predicted environmental fate and toxicity to mammals in comparison to emamectin benzoate, a commercial nematicide used against PWN. The mixtures of Cymbopogon citratus with Mentha piperita and of Foeniculum vulgare with Satureja montana EOs showed the highest activities, with half-maximal effective concentrations (EC
50 ) of 0.09 and 0.05 µL/mL, respectively. For these, complete PWN mortality was reached after only ca. 15 min or 2 h of direct contact, respectively. Their major compounds had a higher predicted affinity to air and water environmental compartments and are reported to have very low toxicity to mammals, with low acute oral and dermal toxicities. In comparison, emamectin benzoate showed lower nematicidal activity, a higher affinity to the soil and sediments environmental compartments and higher reported oral and dermal toxicity to mammals. Overall, uncovering synergistic activities in combinations of EOs from plants of different families may prove to be a source of biopesticides with optimized toxicity against PWNs.- Published
- 2023
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30. A Multicentre Study of the Clinical and Epidemiological Profile of Inflammatory Bowel Disease in Northeast Brazil.
- Author
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de Brito CAA, Celani LMS, de Araújo MVT, de Lucena MT, Vasconcelos GBS, Lima GAS, Nóbrega FJF, Diniz GTN, Lucena-Silva N, Toneto GT, Falcão JVC, Barbosa PM, de Oliveira PRF, Dantas LSX, Fernandes LKC, de Araújo SA, and Martinelli VF
- Abstract
Purpose: Ulcerative colitis (UC) and Crohn's disease (CD) are inflammatory bowel diseases (IBDs) with multifactorial causes. They are becoming more prevalent in developing countries such as Brazil; however, relevant studies in poorer regions of the country are limited. Here, we report the clinical-epidemiological profile of patients with IBD treated at reference centers in three states of Northeast Brazil., Patients and Methods: This was a prospective cohort study involving patients at referral outpatient clinics for IBD from January 2020 through December 2021., Results: Of 571 patients with IBD, 355 (62%) had UC, and 216 (38%) had CD. The patients were predominantly women (355, 62%) for both UC and CD. Extensive colitis was the pattern present in 39% of the UC cases. For CD, ileocolonic disease was the predominant manifestation (38%), with 67% of cases showing penetrating and/or stenosing behavior. The majority of patients were diagnosed between the ages of 17 and 40, corresponding to 60.2% in CD and 52.7% in UC. The median time between symptom onset and diagnosis was 12 months for CD and 8 months for UC ( p =0.042). Joint involvement was the most frequent extraintestinal manifestation, with arthralgia and arthritis present in 41.9% and 18.6% of the patients, respectively. Biological therapy was prescribed to 73% of CD patients and 26% of UC patients. A progressive increase in new cases was observed in every 5-year interval over the last five decades, with 58.6% being diagnosed in the last 10 years., Conclusion: More extensive disease behavior patterns predominated in UC, while forms associated with complications were prevalent in CD. A prolonged time to diagnosis may have contributed to these findings. A progressive increase in IBD incidence was observed and may be related to greater urbanization and better access to specialized outpatient clinics, resulting in improvements in diagnosis., Competing Interests: Dr Lívia Medeiros Soares Celani reports grants from Takeda Pharmaceutical Company, during the conduct of the study. The authors report no other conflicts of interest in this work., (© 2023 Brito et al.)
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- 2023
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31. A single dose of COVID-19 vaccine induces a strong T cell and B cell response in healthcare professionals recovered from SARS-CoV-2 infection.
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Laranjeira P, Rodrigues T, Silva A, Barbosa P, Reis T, Lopes C, Pinho A, Silva S, Silva I, Carvalho A, Pacheco V, Rodrigues F, Araújo L, Antunes I, and Paiva A
- Subjects
- Humans, BNT162 Vaccine, SARS-CoV-2, Antibodies, Viral, Immunoglobulin A, Immunoglobulin G, Vaccination, Delivery of Health Care, COVID-19 Vaccines, COVID-19 prevention & control
- Abstract
A broad understanding on how SARS-CoV-2 infection and vaccination mobilize the immune system is necessary to find the best predictors of long-term protection and identify individuals that would benefit from additional vaccine doses. This study aims to understand the effect of a single dose of Pfizer-BioNTech BNT162b2 COVID-19 vaccine, in individuals recovered from SARS-CoV-2 infection, on circulating CD4
+ T follicular helper (Tfh)-cells, Spike-specific T-cells and IgG/IgA antibodies. For that, peripheral blood samples from 50 healthcare professionals, recovered from SARS-CoV-2 infection, collected immediately before (T1) and 15 days after (T2) vaccine administration, were used to analyze the frequency and numbers of Tfh-cells and their subsets, serum titers of SARS-CoV-2-specific antibodies, and SARS-CoV-2-specific T-cells. Six months after infection (T1), 96% of recovered participants presented either IgG or T-cells specific for Spike, however, Spike-specific T-cells were missing in 16% of them. These individuals presented lower levels of Spike-specific IgG (T1 and T2), IgA (T1), and Spike-specific T-cells (T2). Vaccination increased the percentage of participants reactive for Spike-specific T-cells (from 64 to 98%), IgG (from 90 to 100%) and IgA (from 48 to 98%). It also mobilized circulating Tfh-cells, increasing their frequency and activation, and promoting Tfh17 polarization, restoring the decreased numbers of Tfh-cells (especially Tfh17) observed in recovered participants. Interestingly, Tfh percentage correlated with Spike-specific IgG levels. Our data showed that a single dose of vaccine efficiently restored Spike-specific T-cells, and IgG and IgA antibodies. Mobilization of Tfh-cells, and their correlation with IgG levels, suggest that vaccination induced a functional Tfh cell response., (© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)- Published
- 2023
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32. HPV virus and biomarkers of resistance to chemoradiation in circulating tumor cells from patients with squamous cell carcinoma of the anus.
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Ruano APC, de Jesus Ferreira Costa D, Braun AC, Torres JA, Barbosa PHP, Abdallah EA, Barberan C, Souza E Silva V, Bovolim G, Buim MEC, da Silva Alves V, Riechelmann RP, and Chinen LTD
- Subjects
- Humans, Female, Middle Aged, Anal Canal metabolism, Anal Canal pathology, Neoplasm Recurrence, Local pathology, Prognosis, Biomarkers, Biomarkers, Tumor metabolism, Neoplastic Cells, Circulating pathology, Papillomavirus Infections, Anus Neoplasms therapy, Carcinoma, Squamous Cell pathology
- Abstract
Localized anal cancer is mostly represented by squamous cell carcinoma of the anus (SCCA) and is cured in ≥80 % of cases by chemoradiation (CRT). Development of techniques for detection/evaluating circulating tumor cells (CTCs) for diagnosis/ prognosis/response to therapy can change the manner we treat/follow SCCA patients., Objective: to detect CTCs from patients with SCCA and evaluate the presence of HPV virus, p16 expression and markers related to resistance to CRT (RAD23B/ ERCC1/ TYMS) in CTCs at baseline and after CRT., Methods: CTCs were isolated/quantified by ISET®, protein expressions were analyzed by immunocytochemistry and HPV DNA was detected by chromogenic in situ hybridization., Results: We enrolled 15 patients: median age was 61 (43-73) years, the majority was women (10/15). CTCs were detected in all patients at baseline (median= 0.4 (0.4-3.33) CTCs/mL) and in 8/9 patients, after CRT (median= 2.33 (0-7.0) CTCs/mL). DNA from HPV was found in CTCs in 14/15 patients (93.33 %) at baseline and in 7/9 (77.7 %) after treatment. At a median follow-up of 22.20 (1.45-38.55) months, three patients expressed ERCC1 in CTCs after treatment, with one of them having disease recurrence., Conclusion: We showed that detection of HPV in CTCs from patients with non-metastatic SCCA is feasible and appears to be a sensitive diagnostic method. These results may be clinically useful for better monitoring these patients. However, future larger cohorts may demonstrate whether there is any correlation between the presence of HPV and the expression of screening markers for CRT in SCCA., Competing Interests: Conflicts of interest All authors declared that there are no conflicts of interest., (Copyright © 2023 Elsevier GmbH. All rights reserved.)
- Published
- 2023
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33. Expression of O-glycosylated oncofetal fibronectin in alternatively activated human macrophages.
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da Costa Santos MAR, Dos Reis JS, do Nascimento Santos CA, da Costa KM, Barcelos PM, de Oliveira Francisco KQ, Barbosa PAGN, da Silva EDS, Freire-de-Lima CG, Morrot A, Decote-Ricardo D, Diniz-Lima I, Previato JO, Mendonca-Previato L, da Fonseca LM, and Freire-de-Lima L
- Subjects
- Humans, Cytokines metabolism, Cell Line, Fibronectins metabolism, Macrophages metabolism
- Abstract
Macrophage (Mϕ) polarization is an essential phenomenon for the maintenance of homeostasis and tissue repair, and represents the event by which Mϕ reach divergent functional phenotypes as a result to specific stimuli and/or microenvironmental signals. Mϕ can be polarized into two main phenotypes, M1 or classically activated and M2 or alternatively activated. These two categories diverge in many aspects, such as secreted cytokines, markers of cell surface, and biological functions. Over the last 10 years, many potential markers have been proposed for both M1 and M2 human Mϕ. However, there is scarce information regarding the glycophenotype adopted by these cells. Here, we show that M2- but not M1-polarized Mϕ expresses high levels of an unusual glycoform of fibronectin (FN), named O-glycosylated oncofetal FN (onf-FN), found in fetal/cancer cells, but not in healthy tissues. The onf-FN expression was confirmed in vitro by Western blot and real-time RT-qPCR in primary and cell line monocyte-derived Mϕ. onf-FN was induced by IL-4 and IL-13, but not by pro-inflammatory stimuli (LPS and INF-γ). RNA and protein analysis clearly demonstrated that it is specifically associated with the M2 polarization. In conclusion, we show by the first time that O-glycosylated onf-FN is expressed by M2-polarized Mϕ., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2023
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34. Correction to: Expression of O-glycosylated oncofetal fibronectin in alternatively activated human macrophages.
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da Costa Santos MAR, Dos Reis JS, do Nascimento Santos CA, da Costa KM, Barcelos PM, de Oliveira Francisco KQ, Barbosa PAGN, da Silva EDS, Freire-de-Lima CG, Morrot A, Decote-Ricardo D, Diniz-Lima I, Previato JO, Mendonca-Previato L, da Fonseca LM, and Freire-de-Lima L
- Published
- 2023
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35. Using passive Wi-Fi for community crowd sensing during the COVID-19 pandemic.
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Ribeiro M, Teixeira D, Barbosa P, and Nunes NJ
- Abstract
Sensing passersby and detecting crowded locations is a growing area of research and development in the last decades. The COVID-19 pandemic compelled authorities and public and private institutions to monitor access and occupancy of crowded spaces. This work addresses the detection of crowds in points of interest (POI) by using a territory grid analysis categorizing POIs by the services available in each location and comparing data gathered from a community passive Wi-Fi infrastructure against mobile cellular tower association data from telecom companies. In Madeira islands (Portugal), we used data from the telecom provider NOS for the timespan of 4 months as ground truth and found a strong correlation with sparse passive Wi-Fi. An official regional mobile application shows the occupancy data to end-users based on the territory categorization and the passive Wi-Fi infrastructure in POIs. Occupancy data shows historical hourly trends of each location, and the real-time occupation, helping visitors and locals plan their commutes better to avoid crowded spaces., Competing Interests: Competing interestsNot applicable., (© The Author(s) 2023.)
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- 2023
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36. Computational prediction of human deep intronic variation.
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Barbosa P, Savisaar R, Carmo-Fonseca M, and Fonseca A
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- Humans, Genetic Testing, Introns, Mutation, RNA Splice Sites, RNA Splicing
- Abstract
Background: The adoption of whole-genome sequencing in genetic screens has facilitated the detection of genetic variation in the intronic regions of genes, far from annotated splice sites. However, selecting an appropriate computational tool to discriminate functionally relevant genetic variants from those with no effect is challenging, particularly for deep intronic regions where independent benchmarks are scarce., Results: In this study, we have provided an overview of the computational methods available and the extent to which they can be used to analyze deep intronic variation. We leveraged diverse datasets to extensively evaluate tool performance across different intronic regions, distinguishing between variants that are expected to disrupt splicing through different molecular mechanisms. Notably, we compared the performance of SpliceAI, a widely used sequence-based deep learning model, with that of more recent methods that extend its original implementation. We observed considerable differences in tool performance depending on the region considered, with variants generating cryptic splice sites being better predicted than those that potentially affect splicing regulatory elements. Finally, we devised a novel quantitative assessment of tool interpretability and found that tools providing mechanistic explanations of their predictions are often correct with respect to the ground - information, but the use of these tools results in decreased predictive power when compared to black box methods., Conclusions: Our findings translate into practical recommendations for tool usage and provide a reference framework for applying prediction tools in deep intronic regions, enabling more informed decision-making by practitioners., (© The Author(s) 2023. Published by Oxford University Press GigaScience.)
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- 2022
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37. Relationships between soil properties and species establishment in the restoration of mined soils in the Cerrado biome.
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Vieira DA, Martins TO, Miranda Matias RA, Fernandes Silva PH, Valadão MBX, Barbosa PVG, Gatto A, Rodrigues Pinto JR, Bussinguer AP, and Ribeiro FP
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- Humans, Mining, Trees, Plants, Soil chemistry, Ecosystem
- Abstract
Restoring the ecosystems of the Cerrado biome is challenging considering the diversity of phytophysiognomies present in the biome, some of which are composed of species from different strata (herbaceous, shrubby, and arboreal), which increases the complexity of restructuring the floristic composition. Other factors was involved, such as soil quality, which directly influences the success of restoration, water storage, and nutrients, the financial costs, and a slow ecological process, due to the adverse circumstances found in the area. be restored. The strong anthropogenic interventions by mining processes reduce dramatically the physical and nutritional composition of the soil. We studied two restoration areas in Paracatu, Brazil, to examine their edaphic conditions six years after mining activities ceased and relate them to the status of the restoration process. In 2009, a Cerrado restoration were established in an area previously explored for gravel extraction. Plants were sampled and identified in 11 transects along the planting lines. The diameter base (DB) and total height (HT) were measured. The physical/chemical quality of the soil substrate was determined using a collection of samples in open trenches at four types of points: Cerrado (TC); dead plant pits (TM); seedling pits having living individuals of the most abundant species (TT); and those of the second-most abundant species (TE). Cecropia pachystachya Trécul and Tapirira guianensis Aubl. were most abundant and demonstrated the potential to thrive in areas degraded by mining having low mortality rates and growth at relatively DB and HT. The physical quality indicators in the gravel pits were not limiting, indicating that substrate preparation was efficient in this regard. The organic matter content in TM, TT, and TE was low in comparison to that of TC, and the chemical conditions in the TE pit substrates were similar to those in TM pits, suggesting C. pachystachya is a species with good plasticity, whereas T. guianensis is present in pits with higher levels of phosphorus., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2022 Vieira et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
- Published
- 2022
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38. The obesity and nonalcoholic fatty liver disease mouse model revisited: Liver oxidative stress, hepatocyte apoptosis, and proliferation.
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Reis-Barbosa PH, Marinho TS, Matsuura C, Aguila MB, de Carvalho JJ, and Mandarim-de-Lacerda CA
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- Animals, Apoptosis, Caspase 3 metabolism, Cell Proliferation, Diet, High-Fat adverse effects, Disease Models, Animal, Glucose metabolism, Hepatocytes metabolism, Humans, Infant, Liver metabolism, Male, Mice, Obesity metabolism, Oxidative Stress, Proliferating Cell Nuclear Antigen metabolism, Insulins metabolism, Non-alcoholic Fatty Liver Disease
- Abstract
The study revisited the diet-induced obesity (DIO) mice and the nonalcoholic fatty liver disease (NAFLD) pathogenesis to serve as a translational model. Hepatic beta-oxidation pathways, lipogenesis, oxidative stress, hepatocyte apoptosis, and proliferation were investigated in obese mice. Three-month-old male mice were divided according to their diet for fifteen weeks, the control diet (C group, containing 10% energy from fat) and the high-fat diet (HF group, containing 50% energy from fat). Body weight (BW), liver mass, and steatosis were higher in the HF group than in the C group. Also, gene expression related to beta-oxidation and lipogenesis showed an adverse profile, and insulin and glucose signaling pathways were impaired in the HF group compared to the C group. As a result, steatosis was prevalent in the HF group but not in the C group. Furthermore, the pathways that generate NAFLD were negatively modulated by oxidative stress in the HF animals than in the C ones. The caspase 3 immunolabeled HF hepatocytes with increased gene and protein expressions related to apoptosis while proliferating cell nuclear antigen labeled C hepatocytes. In conclusion, the findings in the DIO mouse model reproduce the NAFLD profile relative to the human NAFLD's apoptosis, insulin signaling, lipogenesis, beta-oxidation, and oxidative stress. Therefore, the model is adequate for a translational perspective's morphological, biochemical, and molecular research on NAFLD., Competing Interests: Conflicts of interest The authors disclose that they have no financial interest or commercial sponsor for this work., (Copyright © 2022 Elsevier GmbH. All rights reserved.)
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- 2022
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39. Atypical Forms of Pyoderma Gangrenosum in Inflammatory Bowel Disease: Report of Four Cases and Literature Review.
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Martinelli VF, Martinelli Barbosa P, Dantas de Oliveira LS, de Melo LALV, Casa Nova JM, and de Brito CAA
- Abstract
Background: Cutaneous involvement is the second-most frequent extraintestinal manifestation of inflammatory bowel disease, with pyoderma gangrenosum (PG) a particularly relevant form because of its frequency, morbidity, and recurrence. The limited number of clinical trials involving PG increases the challenge to gastroenterologists in the management of this condition., Case Presentation: Four cases of atypical presentations of PG are reported. A 25-year-old patient with ulcerative colitis presented an extensive chronic ulcerative lesion on her left leg that was associated with significant bleeding; the intestinal disease was in remission under the use of azathioprine. The patient was on long-term use of 60 mg corticosteroid with no improvement in the skin disease; however, initiation of cyclosporine induced remission. In the second case, a 52-year-old woman was a carrier of Crohn's disease, with a history of partial colectomy. The patient's skin condition had evolved with a cutaneous lesion localized in the perineal region, buttocks, and colostomy pouch, simulating a case of impetigo, and this had been treated with antibiotic cycles without improvement. Lesion biopsy suggested a diagnosis of PG. Consequently, the patient was started on biological therapy with infliximab, and the PG regressed. In the third case, a 38-year-old woman with a history of pancolitis presented a picture of PG with an extensive and deep ulcerative lesion in the right breast. The lesion regressed after treatment with oral corticosteroid. The final case was a 44-year-old woman with Crohn's disease suffering from Crohn's disease pancolitis. The patient's condition evolved with a mixed pattern with pustules, bullae, and ulcerative lesions in the vulva, oral cavity, gluteus, right auricular region, scalp, and left flank, and was resolved by administration of adalimumab., Conclusion: PG is an important and frequent manifestation of inflammatory bowel disease, with a spectrum of clinical variants, significant morbidity, and requiring a variety of therapeutic approaches., Competing Interests: The authors declare no conflicts of interest in relation to this work., (© 2022 Martinelli et al.)
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- 2022
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40. Clinical significance of genetic variation in hypertrophic cardiomyopathy: comparison of computational tools to prioritize missense variants.
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Barbosa P, Ribeiro M, Carmo-Fonseca M, and Fonseca A
- Abstract
Hypertrophic cardiomyopathy (HCM) is a common heart disease associated with sudden cardiac death. Early diagnosis is critical to identify patients who may benefit from implantable cardioverter defibrillator therapy. Although genetic testing is an integral part of the clinical evaluation and management of patients with HCM and their families, in many cases the genetic analysis fails to identify a disease-causing mutation. This is in part due to difficulties in classifying newly detected rare genetic variants as well as variants-of-unknown-significance (VUS). Multiple computational algorithms have been developed to predict the potential pathogenicity of genetic variants, but their relative performance in HCM has not been comprehensively assessed. Here, we compared the performance of 39 currently available prediction tools in distinguishing between high-confidence HCM-causing missense variants and benign variants, and we developed an easy-to-use-tool to perform variant prediction benchmarks based on annotated VCF files (VETA). Our results show that tool performance increases after HCM-specific calibration of thresholds. After excluding potential biases due to circularity type I issues, we identified ClinPred, MISTIC, FATHMM, MPC and MetaLR as the five best performer tools in discriminating HCM-associated variants. We propose combining these tools in order to prioritize unknown HCM missense variants that should be closely followed-up in the clinic., Competing Interests: Author MC-F is a cofounder and scientific advisor of GenoMed S.A., a molecular diagnosis company. Author AF is a consultant to GenoMed S.A. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Barbosa, Ribeiro, Carmo-Fonseca and Fonseca.)
- Published
- 2022
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41. Screening a Targeted Panel of Genes by Next-Generation Sequencing Improves Risk Stratification in Real World Patients with Acute Myeloid Leukemia.
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Matos S, Bernardo P, Esteves S, Botelho de Sousa A, Lemos M, Ribeiro P, Silva M, Nunes A, Lobato J, Frade MJ, da Silva MG, Chacim S, Mariz J, Esteves G, Raposo J, Espadana A, Carda J, Barbosa P, Martins V, Carmo-Fonseca M, and Desterro J
- Abstract
Although mutation profiling of defined genes is recommended for classification of acute myeloid leukemia (AML) patients, screening of targeted gene panels using next-generation sequencing (NGS) is not always routinely used as standard of care. The objective of this study was to prospectively assess whether extended molecular monitoring using NGS adds clinical value for risk assessment in real-world AML patients. We analyzed a cohort of 268 newly diagnosed AML patients. We compared the prognostic stratification of our study population according to the European LeukemiaNet recommendations, before and after the incorporation of the extended mutational profile information obtained by NGS. Without access to NGS data, 63 patients (23%) failed to be stratified into risk groups. After NGS data, only 27 patients (10%) failed risk stratification. Another 33 patients were re-classified as adverse-risk patients once the NGS data was incorporated. In total, access to NGS data refined risk assessment for 62 patients (23%). We further compared clinical outcomes with prognostic stratification, and observed unexpected outcomes associated with FLT3 mutations. In conclusion, this study demonstrates the prognostic utility of screening AML patients for multiple gene mutations by NGS and underscores the need for further studies to refine the current risk classification criteria.
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- 2022
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42. The mTORC1/AMPK pathway plays a role in the beneficial effects of semaglutide (GLP-1 receptor agonist) on the liver of obese mice.
- Author
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Reis-Barbosa PH, Marcondes-de-Castro IA, Marinho TS, Aguila MB, and Mandarim-de-Lacerda CA
- Subjects
- Animals, Liver drug effects, Liver metabolism, Male, Mice, Mice, Inbred C57BL, Mice, Obese, Signal Transduction drug effects, TOR Serine-Threonine Kinases, AMP-Activated Protein Kinases genetics, AMP-Activated Protein Kinases metabolism, Glucagon-Like Peptide-1 Receptor agonists, Glucagon-Like Peptides pharmacology, Mechanistic Target of Rapamycin Complex 1 genetics, Mechanistic Target of Rapamycin Complex 1 metabolism, Obesity drug therapy, Obesity genetics, Obesity metabolism
- Abstract
Purpose: The liver regulates lipid metabolism. Decreasing mTOR (mechanistic target of rapamycin complex 1) and enhancing AMPK (AMP-activated protein kinase) help degrade hepatic diet-induced accumulated lipids. Therefore, the glucagon-like peptide type 1 receptor agonist (GLP-1) is indicated to treat obesity-related liver metabolic alterations. Then, we investigated the effects of semaglutide (recent GLP-1) by analyzing the liver mTORC1/AMPK pathway genes in obese mice., Basic Procedures: C57BL/6 male mice were separated into two groups and submitted for 16 weeks of obesity induction. Then they were treated for an additional four weeks with semaglutide (subcutaneous, 40 μg/kg once every three days). The groups formed were: C, control group; CS, control group plus semaglutide; HF, high-fat group; HFS, high-fat group plus semaglutide. Next, the livers were dissected, and rapidly fragments of all lobes were kept and frozen at -80° C for analysis (RT-qPCR)., Main Findings: Liver markers for the mTOR pathway associated with anabolism and lipogenesis de novo were increased in the HF group compared to the C group but comparatively attenuated by semaglutide. Also, liver markers for the AMPK pathway, which regulates chemical pathways involving the cell's primary energy source, were impaired in the HF group than in the C group but partly restored by semaglutide., Conclusion: the mTOR pathway was attenuated, and the insulin signaling and the AMPK pathway were enhanced by semaglutide, ameliorating the liver gene expressions related to the metabolism of obese mice. These findings are promising in delaying the progression of nonalcoholic fatty liver disease., Competing Interests: Declaration of Competing Interest The authors state that the research was carried out without any commercial or financial relationship considered a potential conflict of interest., (Copyright © 2022 Elsevier Masson SAS. All rights reserved.)
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- 2022
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43. Effect of excess weight and insulin resistance on DNA methylation in prepubertal children.
- Author
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Barbosa P, Landes RD, Graw S, Byrum SD, Bennuri S, Delhey L, Randolph C, MacLeod S, Reis A, Børsheim E, Rose S, and Carvalho E
- Subjects
- Child, DNA Methylation, Epigenesis, Genetic, Humans, Insulin genetics, Leukocytes, Mononuclear, Obesity genetics, Weight Gain genetics, Insulin Resistance genetics
- Abstract
Epigenetic mechanisms, such as DNA methylation, regulate gene expression and play a role in the development of insulin resistance. This study evaluates how the BMI z-score (BMIz) and the homeostatic model assessment of insulin resistance (HOMA-IR), alone or in combination, relate to clinical outcomes and DNA methylation patterns in prepubertal children. DNA methylation in peripheral blood mononuclear cells (PBMCs) and clinical outcomes were measured in a cohort of 41 prepubertal children. Children with higher HOMA-IR had higher blood pressure and plasma lactate levels while children with higher BMIz had higher triglycerides levels. Moreover, the DNA methylation analysis demonstrated that a 1 unit increase in the BMIz was associated with a 0.41 (95% CI: 0.29, 0.53) increase in methylation of a CpG near the PPP6R2 gene. This gene is important in the regulation of NF-kB expression. However, there was no strong evidence that the BMIz and the HOMA-IR were synergistically related to any clinical or DNA methylation outcomes. In summary, the results suggest that obesity and insulin resistance may impact metabolic health both independently in prepubertal children. In addition, obesity also has an impact on the DNA methylation of the PPP6R2 gene. This may be a novel underlying starting point for the systemic inflammation associated with obesity and insulin resistance, in this population., (© 2022. The Author(s).)
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- 2022
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44. How I treat Parkinson's disease.
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Barbosa ER, Limongi JCP, Chien HF, Barbosa PM, and Torres MRC
- Subjects
- Antiparkinson Agents adverse effects, Disease Progression, Humans, Levodopa adverse effects, Quality of Life, Dyskinesias complications, Dyskinesias drug therapy, Parkinson Disease
- Abstract
Background: Parkinson's disease (PD) is a complex neurodegenerative condition. Treatment strategies through all stages of disease progression could affect quality of life and influence the development of future complications, making it crucial for the clinician to be on top of the literature., Objective: This paper reviews the current treatment of PD, from early to advanced stages., Methods: A literature review was conducted focusing on the treatment of PD, in the different stages of progression., Results: Every individual with a new diagnosis of PD should be encouraged to start exercising regularly. In the early stage, treatment should focus on using the lowest dose of levodopa or combination therapy that provides maximum functional capacity, and does not increase the risk of complications, such as peak dose dyskinesias and impulse control disorders. At the moderate and advanced stages, motor fluctuations and complications of treatment dominate the picture, making quality of life one important issue. Rehabilitation programs can improve motor symptoms and should be offered to all patients at any stage of disease progression., Conclusion: Many factors need to be considered when deciding on the best treatment strategy for PD, such as disease progression, presence of risk factors for motor and behavioral complications, potential side effects from dopaminergic therapy and phenotypical variabilities. Treatment should focus on functional capacity and quality of life throughout the whole disease course.
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- 2022
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45. Healthcare, Clinical Factors and Rehabilitation Predicting Quality of Life in First-time Stroke Patients: A 12-month Longitudinal Study.
- Author
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Barbosa PM, Ferreira LN, Cruz VT, Silva A, and Szrek H
- Subjects
- Delivery of Health Care, Humans, Longitudinal Studies, Prospective Studies, Quality of Life, Stroke diagnosis, Stroke therapy, Stroke Rehabilitation
- Abstract
Objectives: One of the long-term rehabilitation goals in stroke survivors is to achieve the best health-related quality of life (HRQoL). This study analyzes the evolution of HRQoL one-year post-stroke to establish the main pre-stroke, clinical, health care and rehabilitation predictors., Materials and Methods: This study uses patient-level data from a one-year single-center prospective cohort study of first stroke patients, assessed at baseline, 3, 6 and 12 months. A generalized linear model with a linear response determined independent predictors of HRQol with EQ-5D-3L and SF-6D. The model included age, gender, scholarity, monthly income, residence, occupation, National Institute of Health Stroke Scale (NIHSS), Modified Rankin Scale (mRS), Barthel Index (BI), Mini-Mental State Examination (MMSE), length of stay, door-to-neurological examination time, access, frequency, and satisfaction with rehabilitation care., Results: A total of 391 acute stroke patients, with a mean disability of 3.7 and severity of 11.7 participated. A decline of HRQoL was observed from baseline to the first three months in both indexes, with an increase in HRQoL at 3 months until 12 months. Scores were significantly lower compared to corresponding population norms throughout follow-up, mostly affected by stroke severity, disability, rehabilitation access and frequency. Higher HRQoL was associated with lower mRS, NIHSS, age, length of stay, and with higher BI, MMSE, scholarity, occupation, and rehabilitation care., Conclusion: Clinical measures and rehabilitation care were the strongest HRQoL predictors of stroke survivors regardless of severity levels. These findings may contribute to the development of future health policies that focus on post-stroke recovery., Competing Interests: Declaration of Competing Interest The Author(s) declare(s) that there is no conflict of interest., (Copyright © 2021 Elsevier Inc. All rights reserved.)
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- 2022
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46. Impact assessment of different DNA extraction methods for non-invasive molecular diagnosis of tegumentary leishmaniasis.
- Author
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de Faria VCS, Gonçalves DU, Soares ARC, Barbosa PH, Saliba JW, de Souza CSA, Cota GF, and de Avelar DM
- Subjects
- DNA, Kinetoplast genetics, Humans, Polymerase Chain Reaction methods, Sensitivity and Specificity, Skin, Specimen Handling, Leishmaniasis diagnosis, Leishmaniasis, Cutaneous diagnosis
- Abstract
The aim of this study was to evaluate two methods of nucleic acid extraction (spin-column-based method - commercial kit and direct boil - DB) from swab sampling compared to biopsy sampling for the diagnosis of tegumentary leishmaniasis (TL), (cutaneous - CL and mucocutaneous - MCL forms). The impact of these nucleic acid extraction protocols on different types of PCR and LAMP techniques were compared regarding nucleic acid quality, molecular assays accuracy, indirect quantitation, and costs. The evaluated patients were 57 TL cases (36 CL and 21 MCL) and 34 non-cases. Swab samples extracted by the DB method showed a higher DNA degradation rate and worse DNA quality in comparison to the commercial kit. Molecular tests performed on biopsy samples showed identical or higher performance in all analysis, as compared to their own performance on swab samples for TL (CL and MCL). However, only the SSU rRNA TaqMan™ RT-PCR test showed a significant difference between the performance of biopsy and swab samples extracted by commercial kit. The kDNA-cPCR coupled with swab extracted by commercial kit showed the highest accuracy (95.6%) for TL diagnosis. The sensitivity of the LAMP-RT 18S method in swab samples extracted with a commercial kit (82.5%) was close to that found in biopsy samples (86%) for TL diagnosis. The DB extraction method presented the lowest cost. The use of swab as a minimally-invasive sampling method, associated with an efficient nucleic acid extraction protocol, may represent a low-cost alternative for the diagnosis of CL and MCL., (Copyright © 2021. Published by Elsevier B.V.)
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- 2022
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47. The prevalence of impulsive compulsive behaviors in patients treated with apomorphine infusion: a retrospective analysis.
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Barbosa P, Djamshidian A, Lees AJ, and Warner TT
- Subjects
- Apomorphine, Compulsive Behavior drug therapy, Compulsive Behavior epidemiology, Female, Humans, Impulsive Behavior, Male, Prevalence, Retrospective Studies, Disruptive, Impulse Control, and Conduct Disorders, Dyskinesias, Parkinson Disease drug therapy, Parkinson Disease epidemiology
- Abstract
Background: Impulsive compulsive behaviors (ICBs) can affect a significant number of Parkinson's disease (PD) patients., Objective: We have studied brain samples from a brain bank of PD patients who received apomorphine via continuous infusion in life to assess the prevalence and outcome of ICBs., Methods: A search on the Queen Square Brain Bank (QSBB) database for cases donated from 2005 to 2016 with a pathological diagnosis of idiopathic PD was conducted. Notes of all donors who used apomorphine via continuous infusion for at least three months were reviewed. Clinical and demographic data were collected, as well as detailed information on treatment, prevalence and outcomes of ICBs., Results: 193 PD cases, 124 males and 69 females, with an average age at disease onset of 60.2 years and average disease duration of 17.2 years were reviewed. Dementia occurred in nearly half of the sample, depression in one quarter, and dyskinesias in a little over 40%. The prevalence of ICBs was 14.5%. Twenty-four individuals used apomorphine infusion for more than three months. Patients on apomorphine had younger age at disease onset, longer disease duration, and higher prevalence of dyskinesias. The prevalence of de novo ICB cases among patients on apomorphine was 8.3%. Apomorphine infusion was used for an average of 63.1 months on an average maximum dose of 79.5 mg per day. Ten patients remained on apomorphine until death., Conclusions: Apomorphine can be used as an alternative treatment for patients with previous ICBs as it has low risk of triggering recurrence of ICBs.
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- 2022
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48. Reply to 'Impulse control disorders are associated with lower ventral striatum dopamine D3 receptor availability in Parkinson's disease: A [11C]-PHNO PET study.'
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Barbosa P, Hapuarachchi B, Djamshidian A, Strand K, Lees AJ, de Silva R, Holton JL, and Warner TT
- Subjects
- Carbon Radioisotopes, Humans, Positron-Emission Tomography, Receptors, Dopamine D3, Disruptive, Impulse Control, and Conduct Disorders, Parkinson Disease diagnostic imaging, Ventral Striatum diagnostic imaging
- Abstract
Pagano and collaborators have recently reported lower ventral striatum D3 receptor availability in Parkinson's disease using PET scan. Our group conducted the first postmortem study of individuals with PD who had ICD and related behaviours in life and reported lower alpha-synuclein pathology and D3R levels in the nucleus accumbens of such individuals. The findings by Pagano and co-authors of low D3R binding in PD patients at baseline, when taken together with our findings of lower Lewy pathology and D3R in the nucleus accumbens, favour the hypothesis that D3R levels are downregulated because of excessive synaptic dopamine., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
49. Phytochemicals as Biopesticides against the Pinewood Nematode Bursaphelenchus xylophilus : A Review on Essential Oils and Their Volatiles.
- Author
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Faria JMS, Barbosa P, Vieira P, Vicente CSL, Figueiredo AC, and Mota M
- Abstract
The impacts of a rapidly changing environment together with the growth in global trade activities has promoted new plant pest pandemic events in forest ecosystems. The pinewood nematode (PWN), Bursaphelenchus xylophilus , causes strong worldwide economic and ecological impacts. Direct control is performed through trunk injection of powerful nematicides, however many of these (hemi)synthetic compounds have raised ecological and human health concerns for affecting non-target species and accumulating in food products. As sustainable alternatives, essential oils (EOs) have shown very promising results. In this work, available literature on the direct activity of EOs against PWN is reviewed, as a contribution to advance the search for safer and greener biopesticides to be used in sustainable PWD pest management strategies. For the first time, important parameters concerning the bioassays performed, the PWNs bioassayed, and the EOs used are summarized and comparatively analyzed. Ultimately, an overview of the chemical composition of the most active EOs allowed to uncover preliminary guidelines for anti-PWN EO efficiency. The analysis of important information on the volatile phytochemicals composing nematicidal EOs provides a solid basis to engineer sustainable biopesticides capable of controlling the PWN under an integrated pest management framework and contributes to improved forest health.
- Published
- 2021
- Full Text
- View/download PDF
50. Neuropsychiatric Features of Punding and Hobbyism in Parkinson's Disease.
- Author
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Barbosa P, O'Sullivan SS, Joyce E, Lees AJ, Warner TT, and Djamshidian A
- Abstract
Background: Little is known about the cognitive and neuropsychiatric profile associated with punding and hobbyism in Parkinson's disease (PD)., Objective: To compare the clinical and neuropsychological features of PD patients with punding and hobbyism to PD controls., Methods: The Questionnaire for Impulsive-Compulsive Disorders in Parkinson's Disease-Rating Scale (QUIP-RS) was used as a screening tool, and a structured interview was used to diagnose punding/hobbyism. Clinical and neuropsychological assessment was conducted with validated questionnaires/scales., Results: Twenty-one patients with PD and punding (PD + pu) were compared to 26 with hobbyism (PD + h) and 25 PD controls. PD + pu patients showed higher levels of anxiety, non-motor symptoms and motor symptoms, and lower Frontal Assessment Battery scores. The PD + h group exhibited similar levels of anxiety and motor fluctuations to the PD + pu group., Conclusion: PD + pu showed increased anxiety and frontal lobe dysfunction, similar to PD + h. Hobbyism could be a prodromal phase with increased risk of leading to punding., Competing Interests: This article presents independent research supported by the Leonard Wolfson Experimental Neurology Centre (LWENC) Clinical Research Facility at the University College London (UCL) Institute of Neurology and UCLH‐National Hospital for Neurology and Neurosurgery, London, UK. We thank the Reta Lila Weston Institute of Neurological Studies for the support received during this research project. P.B.is supported by a grant from Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (Brazilian National Council for Scientific and Technological Development)., (© 2021 International Parkinson and Movement Disorder Society.)
- Published
- 2021
- Full Text
- View/download PDF
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